Q: Can I use PDFNet for PDF redaction?
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A: You can use PDFNet SDK to implement redaction functionality. As a
starting point you may want to take a look at ElementEdit sample
(http://www.pdftron.com/net/samplecode.html#ElementEdit) for an
example of how to remove all images from an existing page. At the
moment PDFNet does not include high-level redaction functions (e.g. as
part of built-in tools in PDFView control etc) but they can be also
implemented using the existing API-s.